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Taiwan Semiconductor Corporation SMA6J12AH
- Part No.:
- SMA6J12AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J12AH.pdf
- Description:
- TVS DIODE 12VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
SMA6J12AH from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a 12V working stand-off voltage, 13.3–14.7V breakdown range at 1mA, and 18.8V maximum clamping voltage at 31.9A peak pulse current. It features AEC-Q101 qualification, DO-214AC (SMA) package, and is designed for automotive-grade surge protection in DC/DC converters and power adapters.
For engineers reviewing the SMA6J12AH datasheet, SMA6J12AH pinout, SMA6J12AH application, or SMA6J12AH equivalent, key selection criteria include clamping voltage under 10/1000μs surge, AEC-Q101 compliance, ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity, moisture sensitivity level 1, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
This unidirectional TVS diode uses a glass-passivated junction to achieve fast response time (<1.0ps) and stable breakdown characteristics across -55°C to +175°C operating junction temperature. Its single-die configuration delivers precise clamping performance with low leakage (≤1.0µA at 12V) and high surge robustness.
The device meets ISO 7637-2 for automotive transients and supports repetitive surge handling up to 4W steady-state dissipation. Its DO-214AC package enables compact board layout while maintaining UL 94V-0 flammability rating and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse voltage before conduction begins; defines system operating margin. |
| VBR @ IT=1mA | 13.3–14.7 V - Breakdown voltage range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM=31.9A | 18.8 V - Clamping voltage limiting downstream circuit stress during 10/1000μs surge. |
| PPPM | 600 W - Peak pulse power handling capability per 10/1000μs waveform per IEC 61000-4-5. |
| IPPM | 31.9 A - Maximum non-repetitive surge current the device safely clamps without failure. |
| TJ Range | -55°C to +175°C - Extended junction temperature range enabling under-hood automotive use. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode-indicating band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance; weight ≈0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance reference plane during transient suppression. |
| Cathode | Reverse-biased terminal / Clamping node | Connected to protected line (e.g., 12V rail); conducts when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| ISO 7637-2 compliance | Withstands defined automotive transients (Pulse 1, 2a, 2b, 3a, 3b) without degradation or latch-up. |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; compatible with J-STD-020 Level 1 handling. |
Applications
| Automotive On-Board DC/DC Converter | Industrial Switching Mode Power Supply |
|---|---|
Use Scenario: Protects 12V input stage of buck converter against load dump and alternator-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed at input filter stage to clamp transients before regulator IC. Use Value: Limits clamped voltage to ≤18.8V, preserving MOSFET gate oxide integrity and preventing controller IC reset. | Use Scenario: Safeguards auxiliary 12V rail in programmable logic controller (PLC) power module. IC Role / Device Role / Timing Role: Standoff protector on secondary-side output, absorbing switching noise and coupling spikes. Use Value: Maintains <1.0µA leakage at 12V, minimizing standby power loss while delivering 600W surge capacity. |
| LED Lighting Driver Input Stage | Automotive USB Power Adapter |
Use Scenario: Shields constant-current LED driver IC from mains-coupled surges in streetlight applications. IC Role / Device Role / Timing Role: Primary-line TVS connected between input capacitor and ground, triggered within <1ps. Use Value: Fast response prevents voltage overshoot beyond 18.8V, avoiding LED string overcurrent and driver latch-up. | Use Scenario: Secures 12V-to-5V USB-C PD adapter input against battery line transients in vehicle cabins. IC Role / Device Role / Timing Role: Input-stage surge limiter upstream of buck controller and USB interface IC. Use Value: AEC-Q101 qualification ensures operation across -40°C to +125°C ambient, meeting automotive environmental specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J12A | No AEC-Q101 qualification; same electrical specs and DO-214AC package. | Not approved for automotive ECUs or ADAS modules requiring AEC-Q101. | Select SMA6J12A only for industrial or consumer applications where automotive qualification is unnecessary. |
| SMB6J12AH | DO-214AA (SMB) package - larger footprint, higher thermal mass, identical electrical parameters. | Requires PCB pad redesign; better suited for higher average power dissipation scenarios. | Choose SMB6J12AH when board space allows and thermal derating margin must exceed DO-214AC limits. |
Compared with SMA6J12A and SMB6J12AH, the SMA6J12AH uniquely combines AEC-Q101 compliance with DO-214AC's compact size-enabling automotive-grade surge protection without layout compromise or qualification risk.
Availability
SMA6J12AH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial SMPS units, and LED lighting drivers requiring stable component supply with full traceability and lifecycle support.
Supply support for SMA6J12AH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The SMA6Jx AH series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in harsh automotive environments and high-reliability industrial power systems.
FAQ
What is the maximum clamping voltage of the SMA6J12AH under a 10/1000μs surge?
The SMA6J12AH has a maximum clamping voltage (VC) of 18.8 V when subjected to its rated peak pulse current of 31.9 A using the 10/1000μs waveform. This value is measured per IEC 61000-4-5 and ensures downstream components remain within safe voltage limits during surge events. The SMA6J12AH achieves this clamping performance while maintaining low leakage and fast response.
Is the SMA6J12AH qualified for automotive applications?
Yes, the SMA6J12AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. It operates reliably across -55°C to +175°C junction temperature and is rated for moisture sensitivity level 1, making it suitable for engine control units, body electronics, and infotainment systems. The SMA6J12AH is explicitly designed for automotive-grade surge immunity.
What package type does the SMA6J12AH use, and what are its key mechanical attributes?
The SMA6J12AH uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Its polarity is indicated by a cathode band, and the molding compound meets UL 94V-0 flammability rating. The SMA6J12AH weighs approximately 0.060 g and supports automated placement.
How does the SMA6J12AH compare to the SMA6J12A in terms of qualification and use cases?
The SMA6J12AH differs from the SMA6J12A solely in AEC-Q101 qualification-the electrical specifications, package, and marking are identical. The SMA6J12AH is approved for automotive safety-critical modules, whereas the SMA6J12A is restricted to industrial or consumer applications. For any design requiring automotive certification, the SMA6J12AH is the mandatory choice.
What is the peak pulse power rating and test condition for the SMA6J12AH?
The SMA6J12AH has a peak pulse power rating (PPPM) of 600 W, tested using the standardized 10/1000μs double-exponential waveform per IEC 61000-4-5. This rating applies at TA = 25°C and reflects non-repetitive surge capability. The SMA6J12AH maintains this rating while delivering 18.8 V clamping voltage and 31.9 A peak current under the same waveform.
SMA6J12AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 18.8V
- Current - Peak Pulse (10/1000µs):
- 31.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J12AH FAQ
1.How can I place an order for SMA6J12AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J12AH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMA6J12AH reliable?
The price and inventory of SMA6J12AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J12AH is usually 5 days.
3.What payment methods are accepted for SMA6J12AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J12AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J12AH?
SMA6J12AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J12AH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMA6J12AH?
For technical support, including SMA6J12AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J12AH requirements.
6.How does Aetrix verify that SMA6J12AH is sourced from the original manufacturer or authorized distributors?
All SMA6J12AH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMA6J12AH meets industry standards.
7.What is the process for return or replacement of SMA6J12AH?
All SMA6J12AH units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J12AH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMA6J12AH part is unused and in its original packaging.
Return procedure for SMA6J12AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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